There are people who feel discomfort when they go to bookstores only.

They suddenly complain of symptoms such as a stomach ache or the need to find a toilet due to need for excretion.

This phenomenon has been called the "Aoki Mariko phenomenon" since its introduction in a Japanese magazine in 1985.

At the time, several experts and media have published three hypotheses about the cause of this phenomenon. What is the connection between bookstore and stool?

Responsible Producer Ha, Hyun Jong / Producer Jae Woo Lee / Directing Seo Hyun Bin Kim Kyung Hee / Photography Seo Jung Hoon / Editing Jung Hye Soo / Design Back Na Eun / Narration Park Chae-woon /

(SBS News)